Am 22.10.2015 um 10:17 schrieb Fam Zheng:
When qcow2 is created on iscsi target with a virtual size greater than physical capacity of the LUN, over time it's possible that guest fills too much data and at that point, new clusters in qcow2 will be allocated beyond the end of disk.
Why would you want to put a QCOW2 on a fixed size block device? Anyway, I like the error code translation. Peter